Structural joist or nailer stud



, relatively small sized Cold forming machines, constant pressure on the nailer strip and hold it gg angles to provide a, flangeportion 5, while the the anges is facilitated and it is possible to use vPatented Aug. 1, l1939 l 2,167,35

UNITED STATES l PATENT OFFICE y l 2,107,835 Y STRUCTURAL JOIST OR NAILER STUD Gerald G. Greulich, Mount Lebanon, Pa. Application December 29, 1937, Serial No. 182,352

v2 Claims. (Cl. 2189-40) This invention relates to a structural member strip, as shown in Figure 2. In either case, a for building use and particularly to light weight groove l2 is formed in the outer surface of said nailer joists or studs. l nailer strip to accommodate the rib I4 in the i Oney object 'of this invention is to increase the outer iiange portion 9. efficiency of beams so that relatively high load In preformlng the complemental members, the 5 carrying capacity is possible in a light weight outer flange 9 extends at an angle, as shown in structural member. dotted lines in Figure 1, to give suliicient clear- Another object of the present invention is to ance to permit free insertion of the nailer strip. provide a lstructural member having a nailer AS pressure is applied to the outer flange portion strip entirely surrounded by metal and subjected 9 to contact the same with the ange Dertien 5 10 to constant spring pressure to hold lt nrmly in for Welding alone the edges of seid flanges. e

position. continuous spring pressure is exerted upon the Other objects and advantages will become ap- Heiler Strip ill, thereby holding Said Haller Stlip parent as the description'proceeds, in which: firmly positioned within the enlarged head D01*- Figure 1 is a. perspective of one form of the tion formed at'each end of the web by said coml5 present invention; and plemental members when assembled. The en- Figure 2 is a perspective of another form of f lere'ed head portion Within Which lClie nailer Strip construction of the present invention. is positioned completely encioses said nailer strip In the drawing, the I-shaped structural melnand protects the Same against fire. vber is formed by joining two complemental symin forming the I-shaped structural member, Slo

metrically shaped strips. of steel. These two the Harmes extend outwardly beVODd the enlarged metal sides or halves of the structural member head portien Within Which the naileI Strip iS are symmetrically formed from relatively light positioned. Under Such a construction, the gage material by passing said material through metallic anges have a spring action and exert a Forming the I-shaped structural member from tightly Within the enlarged head portion- `two symmetrical halves does not require the use Wooden nailer strips sometimes become loose of excessively wide material, as would be the and squeaky, due to shrinkage in drying out case if lthe same were formed from a single piece 0r DOSSibly 120 SWelline and later Shrinking, and, of sheet strip. to overcome this, the nailer strip is made of a 3o A strip of relatively light gage metal is passed height greater than the outer surface of the through a cold forming machine to preform one lOWeI flange and, SllCh being lille CaSe. it IleCeSSihalf of the structural member. In passing the tates forcing the outer flange 9 down against the strip material through the forming machine, Heiler Strip Under Pressure and pinching the the web portion 2 is bent or flared outwardly, edges 0f the flanges @Ogetilel PTOI' t0 Welding- By 35 as shown at 3, and upwardly, as shown at ll,` with providing the structural member with the flanges saidportion 4 beingl bent outwardly at right extending beyond the enlarged heed. Welding of opposite end is bent outwardly, as shown at 6, a Seam Welder i0 make a SeiieS 0f Closely spaced and downwardly, as shown at l, with said por- SDO WeldS. aS indicated ai? |5- 40 tion 'i being bent outwardly at right angles to In the Showing 0f Figure 2, the emplemental provide a flange portion 8, said flange portion bemembers are substantially the same as in Figure ing bent back upon itselfA in spaced relation so 1 except that the iiangeS 3 and 9 are 110i? SPa-Ced as to form an outer flange portion 9, and said and the Web iS DI'OVided With Vertical Corrugaiiange portion 9 extending across the plane of tions I1 to provide stilness thereto. If desired, 45

-theweb and coinciding with the ange portion 5 the web can be provided With Suitable perforaof the complemental member, thereby providingl tionsof required Size and Spacing.

at each end of the structural member an en- Under the present method of forming the I- larged head portion within which is positioned a shaped structural member. the relatively light nailer strip i0. gage sheets are passed through cold forming ma- 50 'Thisnailer strip may be of wood or other suitchines to preform the web and flange portions able composition and is shaped to fit within the and produce an enlarged head portion at each enlarged head portion formed by the metallic end of said web, the nailer strips are positioned members by rounding the inner corners, as shown Within the enlarged head portion and pressure is in Figure 1, or providing a square-cornered nailer applied to the outer flanges of the complemental -55 members to bring them down to abut the ilange of the other complemental member, after which the abutting anges are welded together and, in so doing, continuous pressure is exerted upon the nailer strips to hold them in position. The metal being of a relatively light gage permits nails to be driven therethrough into the nailer strip. The formation of the web is such that there ls a substantially V-shaped channelway provided at each end thereof to receive the nail after it has passed through the nailer strip. .After the nailer strip has been positioned within the enlarged head, grooves i6 are simultaneously formed in the sideslof the complementary members and said nailer strip by pressure pinch-rolls which hold and guide the structural member di- 'rectly before it enters the welding electrodes for Welding the edges of the anges.

While I have shown and described specific embodiments of the present invention, it will be understood that I do not wish/to be limited exactly thereto, since various modifications may be made without departing from the scope of the invention, as defined by the following claims.

yI claim:

l. A structural member comprising a solid web and an enlarged head portion at one end of said web, said enlarged head portion comprising a channel and a nailing strip positioned within said channel and extending above the channel sides, said nailing strip covered by a sheet metal member connected to the sides of said channel.

2. In a structural member including a solid web and enlarged head portions at each end of said web, said enlarged head portions comprising channels, a nailer strip positioned within each channel and extending above ,the channel sides and a cover member secured to said channels for enclosing said nailer strips within said enlarged head portions, said cover member adapted to exert a constant spring pressure upon said nailer strip when welded to said channel to maintain said nailer strip firmly in position.

GERALD G. GREULICH. 

